public class ConversionDemo01 {
    public static void main(String[] args){
        int a =10;
        int b =20;
//        System.out.println(a+b);
        int c = a + b;
        System.out.println(c);
        System.out.println("---------------------------------------------");

        int aa = 10;
        byte bb = 20;
//        System.out.println(aa+bb);
//        byte cc = aa + bb;
//        System.out.println(cc);
         System.out.println("-----------------------------");
         byte dd = (byte)(aa + bb);
         System.out.println(dd);
         System.out.println("--------------------------------------------------");




         double d1 = 3.14;
         int a1 = (int)d1;
         System.out.println(a1);



    }
}

